Ecm swap

[Ryanjave]

Will a 1994 ecm plug in and run a 1994 351 using a 1986 f150 5.0 efi engine wiring harness need help

[85lebaront2]

Not well, there were a number of changes between 1986 and 1987 in the actual engine controls. EGR being one of them. Go here and look at the ECM pinouts: http://www.garysgaragemahal.com/electronic-engine-control-eec.html